Gordon H. Hanson holds the Pacific Economic Cooperation Chair in International Economic Relations and is director of the Center on Global Transformation at the University of California, San Diego. William R. Kerr is the Dimitri V. D'Arbeloff-MBA Class of 1955 Professor of Business Administration at Harvard Business School. Sarah Turner is the University Professor of Economics and Education and Souder Family Professor at the University of Virginia. All three are research associates of the National Bureau of Economic Research.